Preparation method of lamination battery cell

Abstract

The invention provides a preparation method of a lamination battery cell. The preparation method of the lamination battery cell comprises the following steps: a lamination pile comprising n lamination groups is arranged, wherein each lamination group comprises m pole piece elements, n is more than or equal to 2, and m is more than or equal to 2, and gaskets are arranged between the adjacent lamination groups; the pole piece elements of all the lamination groups of the lamination pile and the gaskets between the adjacent lamination groups are sequentially positioned in a Z-shaped isolation membrane along the piling direction; each gasket separates the upper and lower parts of the adjacent isolation membranes; forming a lamination battery cell is formed, namely, the isolation membranes are disconnected at one end of each gasket, positioned in the isolation membranes, so that each gasket and each lamination group can be separated, and further, the lamination battery cell formed by the pole piece elements in each lamination group and corresponding isolation membrane can be obtained, wherein each lamination battery cell comprises an anode pole piece and a cathode pole piece, or a monomer battery cell, or a monomer battery cell, or the combination of the monomer battery cell and the anode pole piece and / or cathode pole piece, so that the efficiency of the lamination battery cell is improved greatly.

Description

technical field [0001] The invention relates to the technical field of electrochemical energy storage devices, in particular to a method for preparing a laminated electric core. Background technique [0002] As the most representative energy storage device in the field of new energy, lithium-ion batteries have been widely used in mobile electronic devices, electric vehicles, energy storage and other fields. According to different preparation processes, lithium-ion batteries can be divided into wound-type lithium-ion batteries and laminated lithium-ion batteries. [0003] At present, the core preparation process of laminated lithium-ion batteries is basically divided into the following three types: [0004] (1) Simple stacking type: the positive pole piece, the negative pole piece and the separator are cut into a predetermined size, and then in the order of the negative pole piece--the separator--the positive pole piece--the separator--the negative pole piece The slit posit...

AI Technical Summary

Problems solved by technology

[0007] In the traditional preparation process of Z-shaped separator-type laminated battery cells, since the separator needs to be cut off every time a battery cell is prepared, the next battery cell can be prepared, so the operation is cumbersome. The preparation of the core requires a long auxiliary time, so the production efficiency needs to be improved, and the performance requirements such as the durability of the isolation film slitting device are high

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